diff --git a/devel/rubygem-mustermann/Makefile b/devel/rubygem-mustermann/Makefile
index 6a47b9716497..2dbd6079dbc2 100644
--- a/devel/rubygem-mustermann/Makefile
+++ b/devel/rubygem-mustermann/Makefile
@@ -1,17 +1,17 @@
 PORTNAME=	mustermann
-PORTVERSION=	3.1.1
+PORTVERSION=	4.0.0
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Library implementing patterns that behave like regular expressions
 WWW=		https://github.com/sinatra/mustermann/tree/main/mustermann
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		gem
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
diff --git a/devel/rubygem-mustermann/distinfo b/devel/rubygem-mustermann/distinfo
index 761fe8800c92..1c9727717a1f 100644
--- a/devel/rubygem-mustermann/distinfo
+++ b/devel/rubygem-mustermann/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1776864248
-SHA256 (rubygem/mustermann-3.1.1.gem) = 4c6170c7234d5499c345562ba7c7dfe73e1754286dcc1abb053064d66a127198
-SIZE (rubygem/mustermann-3.1.1.gem) = 40448
+TIMESTAMP = 1779223114
+SHA256 (rubygem/mustermann-4.0.0.gem) = 91f67411bb208d1d93c41e6128cb3b0f8ddd9ec7c45966f1007e1c43c08040d7
+SIZE (rubygem/mustermann-4.0.0.gem) = 54272